Quote:
Originally Posted by 71CHEVYSHORTBED402
Are you saying 67-72 came without female threads? As I mentioned earlier, the cast iron pulled from my truck was without threads.
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I can't say with 100% certainty, but I don't think 72 & earlier thermostat housings originally had that female threaded hole in them. I've seen both iron and aluminum versions of the housings without the hole ... I don't know if that was something that changed after a certain year or if it varied by application.